Enclosed combined switch and fuse



Aug. 2l, 1934.

W. G. DEXTER ENCLOSED COMBINED SWITCH AND FUSE Filed April 4, 1932 5Sheets-Sheet l Z6 Z4 1,01 Z3 7kg-Madu- QINVENTOR ATTORNEYS Aug. 21,1934. w. G. DEXTER ENCLOSED COMBINED SWITCH AND FUSE Filed April 4, 19325 sheets-sheet 2 Aug. 21, 1934. w- G. DEXTER 1,970,558

ENCLOSED COMBINED SWITCH AND FUSE Filed April 4, 1952 5 Sheets-Sheet 3ATTORNEYS W. G. DEXTER ENCLOSED COMBINED SWITCH AND FUSE Filed April 4,1932 5 Sheets-Sheet 4 I VEANTOR ATToRN r-:YS

Aug. 2l, 1934. w. G. DEXTER .ENCLOSED COMBINED SWITCH AND FUSE FiledApril 4, 1932 5 Sheets-Sheet 5 w mw uw ATTORNEYS description.

'U' appended claims, reference being had to the' Patentedy tg'. 2l',1934 Y rU-NITED OFFICE-1 tomos ENoLosEn COMBINED SWITCH A-ND FUSEvWallace G. Dexter, 'new roik, N'. Y. l Application April 4, i932,sentiero 602,936

ZQIa-ims. (C.

'rois invention relates to on enclosed combined switch and fuse. j VOneobject of this invention isy the provision of a combined switch and fusewhich is enclosed so that it is impossible to touch any in the device. v

' Another object is the provision of an enclosed' combined switch andfuse which may be rnanipue' lated so that the fuses may be replacedWithout danger 'of' Corning in Contact with any current live contactscarryingv Wires o r live switch parts.

Other objects of theinvention will be 'in part obvious and in partpointed out in the following To the 'accomplishment otthefolegoing andsuch other objects as mai7 hereinafter appear,

this inventioncoi'nprises Vthe construction, coinbinati'on andarrangement "of parts hereinafter described and then sought to bedefined inthe accompanying drawings forming a part hereof,

and which show, merely for the purpose of illus` trative disclosure, apreferred embodiment of invention and several adaptations thereof, itbejing 'expressly understood,` however, that various changes may be iliadein practice ,within thescope of the, claiins without digressing from 'myinventive idea. lY

In the drawings: Figure 1 represents a front plan rvi ev v with partsshown incross section and parts broken away to facilitate thedisclosure.igure 2 represents a transverse verticalross section. l v U Figure 3.represents a horizontal transverse cross section takensubstantially.onllne vEle-e?? Cbpecq t'th x nt mmbe'rsnzg by Figure 4 'represents adetail view showing the.I means f the Conducting bars 36 which passmeans for releasing the-operating handle ofithe' Smtedbar 38 ma alleCocted t thlower.

Figure 2. i

fuseis substituted forithefuse shownin, Fig= Figures 9, 10, 11 'andlf2`show the'parts-in the various positions when the device ismanipulated to release and expose the fuses. i

Figure 13 represents a fron-t plan viewhwith parts shown in .crosssection to facilitate the' disclosure, the 'showing being 'a'ihodiiicati'on usingv o single pole.

Figure 1 4 is o 'view similar to Figure 13 showings 'inoili'ficatioiiwith o. "3='pole switch.

Figure `1`5 ls a reduced perspective view of a. slightlyV iiio'o'iiieillforni to illustrate the device with the 'fuses protruding from theapertures in t'hejfroilt of tlie box container and which are concealedby the 'cove lf w lien closed, parts being broken away' one omitted tofacilitate the dise closure. Referring now to the drawlngs, referencechar: actor '2o designates a bei; or container for housing theswitooinectlaiiisiii, the pox or Acontainer being provided vvith a back'panel 2 1 which is of insu= loting' iiioteilal. A central top portionQ22 less in len-gta than the width ofthe container -2o, and less itiwidth tiran the depth of the container, is atto-oiled to oa'cl;oane12'1, Top portion 2 2 is orovjioeo at its frontedge with a Icurvedlip 23, Ao-Y jaoe'nt the 4central top portion 22 and at each sigletirets-of, the oox or' 'container 2o is provided 'with integral slopingor inclined' top portion 24. The top sloping portions 24 are provided`with tilev cutawaypottiori's 25 to permit' movement of certaiiifoartsof tlieovlce later to be described and to provide slioiiloer 26 at theiront corner ofthe front face' of the boi:l VA20 is cut away as at 27 tooiovioesoacefoi movements of certain parts ofthe oevioeto eclaterdescribed. Fixed lower oontact'inemoers 2a ateconnected to the backpanerzl by means of trie not' and bolt soie; ceived "in the groove 32,The upper contact., members 34 are connected to the Aback panel 21" in asiiiillai fashion; The switch is pivotally tiiroiig'ii the 'bottonicio-ss oar or connecting in;

clio monitors Received within the clips 39 are trie fuses 41. The upperportions of fuses 411 ater'eoelveriwitiiin clips 42 provided with con;diicting'bas 44. The c'iil'fidil'cti iigy bars 44 extendthrougliiand-a'eoiigiected to the upper connecte Figures 7 and 8represent Vertical sectional; mg bar or md 46 w Ich is opratlv'elyconnected views of a modification in which av knife -blade' withthehandle of the switch. I'he upper clip' meinoers' 42 nolo tlio fuses 41with incre tension tiienlowejr olio ineiiioefs 3 9 so that when the clioof trie* stiitcii incensi-inni, the fuses' ieinain in the toner cliomein ei'42', ossriotvn in Figure 12'.

1- fri-i tiener connecting' bei" or roo 4o is provided with e reducedcoa-tial ciioiilai portion 4i to receive tite iiooef oortioii 48 of iotl49. 'roe roti@ sie 49 is telescoplcally received within the cylindricalmember 50 connected at its lower end to the bottom cross bar 38 by meansof the threads 51. The upper portion 49 has a semi-circular cut awayportion 52 which fits central reduced portion 47 of rod 46. Connected tothe upper part of rod 49 by means of screws 53 is a cap 54 provided witha semi-circular cut away portion 55 to surround the upper portion of thecentral reduced portion 47 of the bar 46.

The cap 54 is so attached to the rod 49 as to permit relative movementbetween the parts and the rod, and the rod 49 is, therefore, rotatablymounted on the central reduced portion 47 of cross bar 46. As shown inFigure 6, the cross bar is provided with a body of general rectangularform with thc reduced circular portion 47, and the spaced squareportions 56 provided with the openings 58 for receiving the uppercontacting bars 44. At the outer ends, the square portions 56 areprovided with reduced diamond-shaped projections 60, and the reducedrounded ends 62.

The handle 64 is positioned exteriorly of the box or container 20 formanually operating the switch. The handle is provided with angular arms66 which are connected to the bar 46 by links 61. These links arepivotally connected at 67 to the arms 66 and are provided with aperturedends which t over reduced rounded ends 62 of the cross bar 46. The arms66 are connected to the handle 64 by the angular portions 68 whichnormally extend beyond the front of the container or box 20. The arms 66are formed with the vertical elongated flat portions 70 which arenormally positioned within the container or box 20. At their lower endsAthe arms are apertured, and are mounted on sleeves 72 which areslidably mounted on the axle or rod 74. The axle or rod 74 is rigidlysecured to the sides of the box or container 20. At their outer ends thesleeves 72 are provided with iianges or collars 76 against which thelower apertured ends oi' portions 70 abut. At their inner ends andadjacent each other, the sleeves 72 are provided with spaced verticalears or wings 78. Vertical portions 70 of arms 66 are provided withflanges 80 adjacent their lower ends, which are normally received invertical slots 82 formed in the sides of the casing or container 20.Curved springs 84 are each secured at their one end to the sides of thecasing by securing means 85 and the other end of each of the springsbears against flanges 80 on portions 70 of arms 66 so as to force thearms 66 forwardly and release the switch when the anges 80 are removedfrom slots 82.

The front portion of the box or casing 20 is provided with a button 86slidably mounted in a housing 88 (see Figure 4). The inner portion ofthe button is provided with a V-shaped notch 90. When the button ispushed inwardly, vthe ears or wings 78 are drawn toward each other bythe V-shaped portion 90, and the4 flanges 80 on portions 70 of arms 66are removed from the slots 82, and the arms 66 are then forced into theposition shown in Figure 9 by the springs 84. This action quickly breaksthe switch and opens the circuit without arcing.

After the switch has been released it is necessary to bring the fusesthrough apertures in the front of the box or container so that new fusesmay be inserted without danger of electric shock, and the followingconstruction has been provided for this purpose.` The front of thecasing or box 20 is provided with apertures or out away portions 91 topermit fuses 41 to project beyond the front of the casing. The front ofthe casing also has cut away portions 92 to permit portions 70 of arms66 to pass to the position shown in Figure 9. The casing or box 20 isprovided with a pivoted cover 93 which is substantially the same widthas top portion 22 and which lits under curved lip 23. The cover isprovided with the curved hooked portion 94 received in the opening 95 inthe front of the box or casing 20. The cover 93 is provided with ahandle 96 which is riveted or otherwise secured to the cover, the rivetsor other securing means being positioned within openings or cut awayportions 91 when the cover is in closed position. The lid or cover isprovided with the elongated flat side portions 98. The cover ispivotally mounted at its upper rear end on the rod which is pivotallyconnected at each end to one end of a link 101. To hold the rod inposition a curved leaf spring 102 is provided which is attached at itsone end to top 22 of the box or container 20. This spring also actsagainst cap 54 and rod 49 to force the fuses into position when theswitch is closed, as shown in Figures 1 and 2. The link 101 at its otherend is attached to the side wall of the box or container 20 by means ofthe pin or rivet 104. The side portions 98 of the lid or cover and thelink 101 are spaced by means of the sleeve 106. The side portions 98 areeach provided with the angular projecting portion 108 having the hookportion 110. Above the hook portions 110, side portions 98 are providedwith inclined portions 112. When the button 86 is pressed, the switch isbroken and the diamondshaped reduced portions 60 pass between the hookportions 110 and the inclined portions 112.

When the lid or cover 93 is lifted and during the first part of themovement, the lid or cover pivots around rod 100, the spring 102assisting to hold the rod in position. During this movement hookportions 110 engage the diamond-shaped ends 60 of cross bar 46 and raisethe fuses along a rectilinear line into the position shown in Figure 11until the reduced rounded ends 62 abut the corners 26 of the inclinedportions 24 of box or container 20 so as to prevent further rectilinearmovement of the fuses. During this movement the fuses 41 have beenremoved from the lower clips 39 (see Figure 11). Then the lid or coverpivots around cross bar 46 and the rod 100 is forced downwardly againstthe action of spring 102 to the position shown in Figure 12 so that thefuses are rotated and presented at the front of the box or container andmay be examined and replaced if necessary. When the fuses are presentedat the front of the box, curved hook 94 at the end of its travel abutshandle 64 and prevents further movement of the lid or cover, locking inthat position.

In order to prevent opening of the lid or cover when the switch is inoperative position, the lid or cover is provided with struck out flanges114 and the arms 66 are provided with struck out ears 116, the flangesand ears cooperating to form a locking means.

As before pointed out the front face of the box or container 20 isprovided with cut away portions 91 to permit the fuses 41 to be extendedfrom the box or container. The lid or cover 93 overlaps a portion of thefront face of the box or container, and when in closed position coversup the fuse openings above described so that it is impossible to touchor tamper with any live parts of the switch.

Figures 7 and 8 show the invention applied to a knife blade fuse but theprinciple of operabinedfuse and switch and with the partsshown therrotation of the cover. i

fil

` 'shaped notch 90 which contacts with the wings '18v` tion is similarto that described in connection with the -form shown in Figures l and-2.In thismodi-4 iication, the form of the clip members iis changed soas toaccommodate a knife blade/fuse. lThe lower clip member 11'7 is formedwith a cupmemf ber 118 which is formed of two parts spaced apart aboutthe thickness of the knife blade on the fuse.- This clip member isprovided with the slot or channel 120 to receive the knife bladefl22-ofthe vfuse 124. The upper clip memberv 126. is formed from two pieces ofmetal which are bent to form a cup member 128the parts being spacedapart about the thickness ,of the `knifeblade on the fuse, and isprovided with a slotor channel 130 tov receive the upper blade 132,-ofthe knife blade fuse. Above the slot 130 the parts` are fastenedtogether byL meanso .rivet 133 orthe like.. Above this point themembersare spread apart to form the jaw-portions 134 which-.are adaptedtoreceive the fixed contact members 136 which may be of one piececonstruction or may include a plurality .of parts. Itis' to be notedthat the movable part is of a jaw construction 134.- and receives thexed member or members 136. VWhen this construction is used lin myenclosed commember is formed of two parts, 'whichl aresepa rated asuiiicient distance. to permit-passage of thelower knife blade 122, thefuse may assume the position shown in Figure 12, and be removed,examined, and replaced if necessary ater fur- Figure 13 shows theinvention appliedto` a single pole switch, and Figure l4vshows theinvention applied to a 3-pole switch, but the principle of operation'and the operating partsare the-same as that described in connection withthe Vform spacer-sand -braces so that a single plate may be j 'used foran entire wall o r fora plurality of switches. y I i The operation ofthe device shown in Figs. 1 and 2 will now be described, but it is to beex pressly understood that the other modications lusing different typesof fuses and different numV bers of fuses operate in the same way. -Whenthe switch is to be released so that the fuses may4 be examined orreplaced the button 86 is pushed inwardly. The button is provided withthe V- to draw the sleeves 72 inwardly.` The sleeves are provided withthe anges l'I6 which draw the lower ends of elongated portions '70 ofarms 66 inwardly so as to remove ears oranges from the *de- 'pressions82.

,link 61. When the arms 66 are moved outwardly 'they remove the.conducting bars :44,from the upper contact membersl 34 `and the fuses"pivot about the bottom contact'members 28.4 Injthis position the circuitis broken and-no current.v passesthrough the fuses.. The next .operationis4 to grasp handle 96.on cover 93 and force the cover upwardly so thatit pivots around rod 100 as showninFigure 10. The cover is provided withthe hooknportions llwhi'ch are adapted to cooperate` with thediamonds-shaped portions 60 on rod..46 to' release the fuses and presentthem at the front of the box or container 20. In Figure 10 it willfbe'seen that the ends of the hook members 110 contact with the diamondshaped projections 60.-Further'rotation of the cover 93 causes the .hookmember `110 to engage the diamond shaped projection 60 on rod46 as inFig. 11. Duringthis movement the fuses have been moved in 'a straightline and have been removed from the bottomclip members 39. This is onefeature of-.myv invention andIihave used a minimum of parts to effectthis rectilinear movement of the fuses so that the fuses are removedfrom bottom clip members 39. At the end of this straight line orrectilinear movement the rounded reduced portions 62 of rod 46 'abut thefront corners 26 ofthe box -.or container to prevent furtherrectilinearV movement of the fuses. During this movement there is aseparation of cross bars 38 and 46 due to the telescopic connection 49,50. When the cover 93 is moved further the parts pivot about rod 46 asshown'in Fig. 12, and the rod 100 is moved downwardly against the spring102. The hook portions 110 are engaged with the diamond-shaped portions60 and rotate rod 46 so as'to presntfthe fuses atthe front of the casingas shown in" Figure 12. f 'I'his double or compound pivoting of coverv93 first around rod 100 and then around rod 46 is another featureof myinvention and permits the 'rectilinear movement above reflerred-to and`then a rotary movement of the fusesso that they project from thefront'ot the casing. 'When the'end of the movement or travel ofthe cover93'v is reached hook portion'94 on cover- 93 abuts handle 64 and locksin this position to prevent any further relative movement between theparts. While the fuses are in this position they may be removed,examined and replaced if necessary.

When the switch is to be placed in operative position, 'the reverse ofthe movement just described is lperformed and the cover 93 is forceddownwardly so as to cause the fuses to pivot around rod 46 into theposition shown in Figure 11. Further downward movement of the cover-93'forces the fuses 41 into the lower clip members 39 as shown in Figure9. The handle 64 of theswitch is then forced inwardly until the ears orflanges 80 are received in depressions 82 to hold the parts intooperative position with conducting bars 44 engaging the contact members34; `In order to insure that the fuses are rigidly held in positionspring 102 abutsv the cap 54- of rod 49 so as t'o'iorce the fusesdownwardly into engagement `with the lower clip member 39.

While Fig. 15 is a perspective view to show the device in open position,it is also a slight modification as it shows the'casing including top22' as -formed of an integral structure so that top 22' is the samewidth as the casing.

From the foregoing Vdescription it will be apparent that-I havedisclosed a relatively simple, compact `device which is certain and safein its operation. v f' -WhatI"c1aim is:

"1.In` a device of the character described, a casing, a switch andafusein said casing, means forreleasing said switch, a pivoted cover onsaid casing, means on said cover for'removing said fuse from said'switch while said switch is in lan inoperative position.

2. In a.. device of the character described1 a pivoted switch providedwith a fuse, means for automaticallyreleasing said switch to open thecircuit, and means for removing said fuse from said switch while thecircuit is open.

`3. In a device of the character described, a casing having an opening,a switch in said casing, said switch being provided with a `fuse, meanswhereby said switch may be released to .open the circuit, and means onsaid casing for removing said fuse from said switch while the circuit isopen so that the fuse extends from said opening in said casing and maybe manually grasped.

. 4. A deviceof the character described, including, a pivoted switchmember provided with upper and lower clip members to receive a fuse, apivoted operating handle for said switch, means for automaticallyreleasing vsaid switch and means for separating said upper and lowerclipmembers and rotating vsaid upper clip member.

5. A device of the character described including, a casing, a pivotallymounted vswitch therein and provided with a fuse and clip memberstherefor, a cover for lsaid casing, and means associated with said coverfor removing the fuse from one of said clip members.

,6. In a device of the character described, a pivoted switch, anapertured coverv plate therefor, said switch being provided with .afuse, means for releasing said switch to open the circuit and means forreleasing one end of said fuse and rotating said fuse so that the fuseprojects through the aperture in said cover plate. '7. In a device ofthe character described, an enclosure, aY pivoted switch mounted in saidenclosure and provided with upper and lower clip membersl and a fuse,means for releasing. said j switch, and means for removing said fusefrom the lower clip member and then rotating said upper clip member andfuse to present the fuse at the iront of the enclosure. l Y Y 8. In adevice of the character described, a housing, a pivotally mounted switchin said housing and provided with a fuse, a cover, cross bars connectedto said fuse, telescopic means connecting said cross bars and means forcausing relative movement between said cross bars for removing said fusefrom operative position.

9. In a device of the character described, a casing, a switch pivotallymounted in said casing, an operating handle pivotally mounted in saidcasing, means connecting said operating handle and said switch, meansfor releasing said operating handle and said switch and means forremoving a fuse from said switch while the switch is in releasedposition.

10. In a device of the character described, a casing, a pivotallymounted switch in said casing and provided with a fuse, a cover for saidcasing, said coverbeing provided with means for causing rectilinearmovement of said fuse while the switch is in released position and thenfor caus- -ing rotary movement of said fuse so that it projvwhereby saidswitch is released, and means including a compound pivoting for removingsaid fuse from said switch while said switch is in released position,said means rotating around one pivot to cause rectilinear movement ofthe fuse and free it from one of the-clip members and the means thenrotating about 'another' pivot to cause rotary movement o1' the fuse andpresent it at. the front of the casing.

12. A device of the character described, ncluding, a housing, anoperating handle held in operative position, means for releasing saidhandle, a pivoted switch in said housing and having clip members and afuse, means connecting said handle and said switch, a cover providedwith a plurality of pivots' and provided with means whereby when thecover is rotated on one pivot the fuse is removed from one clip memberand when rotated on another pivot the fuse is given a rotary movement. l

13. A device of` the character described, including, a housing, a switchpivoted therein, said switch being provided with upper and lower clipmembers adapted to hold a fuse, means for releasing said switch to openthe circuit, means includine a plurality `of pivots for impartingrectilinear movement to one of said clip members to releaseone end ofthe fuse and then imparting rotary movement -to said clip member iorrotating the same so that the fuse projects from the front ofthehousing.

14. A device of the character described, including, a housing, a switchcomprising upper and lower cross bars, means for telescopicallyconnecting said vcross bars, a cover for said housing, means associatedwith said cover adapted to cooperate with said upper cross bar to effecta separation of said Across bars and then a rotation o! said upper crossbar whereby a fuse connected to said upper cross bar may project fromsaid housmg. i

15. A device of the character described, including, a housing, a switchcomprising upper and lower cross bars, means for telescopicallyconnecting said cross bars, an operating handle for said switch, saidupper cross bar being provided with angular means, and means pivoted onsaid housing and cooperating with said angular means on said upper crossbar to cause a separation of said cross bars during a part of themovement and then effecting a turning of said upper bar by engagementwith said angular means on said upper cross bar. f

16. A device of the character described, including, a housing, a pivotedswitch with upper and lower cross bars, said upper cross bar having anangular reduced end, means for releasing said switch, a pivoted cover onsaid housing, said cover having a hooked member adapted to cooperatewith said angular reduced end on said upper bar to rotate said uppercross bar and expose a fuse of the switch.

17. A device of the character described, including, a housing, a switchpivoted in said housing and having upper and lower cross bars and clipmembers, said upper cross bar having an angular reduced end, means forreleasing said switch, a cover pivoted at a plurality of places andhaving a hooked member adapted to cooperate with said angular reducedend of said' upper cross bar whereby rotation of said cover on one pivotmoves the upper cross bar along a straight line to release a fuse insaid switch and further rotation of said cover on another pivot rotatessaid upper cross bar whereby a fuse in said switch is exposed at thefront of the housing.

. 18. A device of the character described, including, a housing, apivoted switch therein and having upper and lower cross bars and clipmembers, said upper cross bar having an angular reduced end, means fortelescopically connecting said cross bars, means for releasing saidswitch, a cover pivoted to said housing, said cover having hooked meansadapted to cooperate with said angular reduced end of said upper crossbar whereby initial rotation of said cover moves said upper bar in astraight line and further movement of said cover rotates said upper barto expose a fuse of the switch at the front of said casing.

19. A device of the character described including, a housing, a switchmounted in said housing, said switch being provided with a fuse and clipmembers therefor, a cover for said housing, and means associated withsaid cover for removing the fuse from one of said clip members whilesaid cover is being moved to open position and when said switch is open.

20. A device of the character described, including, a housing, a coverpivotally mounted on said housing, a switch pivotally mounted in saidhousing, said switch being provided with a fuse, means whereby saidswitch may be released to open the circuit, and means associated withsaid cover whereby rotation of said cover on its pivot causes removal ofsaid fuse from said switch while the switch is open so that said fuseprojects from said housing and may be manually grasped.

21. In a device of the character described, a housing, a switch mountedin said housing and provided with upper and lower clip members adaptedto receive a fuse, means whereby said switch may be released to open thecircuit, and means for removing a fuse from one of said clip memberswhile the switch is in released position and then rotating said otherclip member so that the fuse projects from said housing.

22. In a device of the character described, a housing, a switch mountedin said housing and provided with upper and lower clip members adaptedto hold a fuse, means whereby said switch may be released to open thecircuit, and means for moving one of said clip members along asubstantially rectilinear path while the switch is open and thenrotating said last mentioned clip member so that a fuse held thereinwill be projected from the casing.

23. In a device of the character described, a casing, a switch pivotallymounted in said casing and provided with upper and lower clip membersadapted' to receive a fuse, said casing being provided with meanswhereby substantially rectilinear movement of one of said clip membersmay be effected to remove a fuse from said other clip member While saidswitch is in released position and then for effecting rotary movement ofsaid first mentioned clip member so that the fuse projects from saidcasing and may be removed from said first mentioned clip member.

24. In a device of the character described, a casing, a switch pivotallymounted in said casing and provided with upper and lower clip membersadapted to receive a fuse, said casing being provided with means wherebyrectilinear movement of said upper clip member is brought about toremove a fuse from said lower clip member while said switch is inreleased position and then for causing rotary movement of said upperclip member so that the fuse projects from said casing and may beremoved from said upper clip member by an operator.

25. A device of the character described, including, incombination, acasing, a switch provided with a cross bar, an operating handle for saidswitch, said cross bar being provided with means whereby said cross barmay be moved when it is desired to replace fuses in the switch, andmeans on said casing cooperating with said cross bar means whereby asubstantially rectilinear movement is rst given to said cross bar andthen a rotary movement is given to said cross bar.

26. In a device of the character described, a casing, a Switch pivotallymounted in said casing, said switch being provided with a cross bar andadapted to receive a fuse, means whereby said switch may be released,said cross bar and casing being provided with means whereby said crossbar may be moved along a substantially rectilinear path and then rotatedto project a fuse from said casing.

27. In a device of the character described, a casing, a switch pivotallymounted in said casing, said switch being provided with a cross bar andupper f and lower clip members adapted to receive a fuse,

means whereby said switch may be released to open the circuit, saidcross bar and casing being provided with cooperating means whereby saidcross bar and one of said clip members may be moved along asubstantially rectilinear path and then rotated to project a fuse fromsaid casing.

WALLACE G. DEXTER.

